Testing RNGCryptoServiceProvider

code.cs

using CsvHelper;
using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;
using System.Collections.Concurrent;
using System.Threading.Tasks;

namespace SecurityGame
{
    class Program
    {
        public static Level[] Levels = new Level[]
            {
                new Level0(),
                new Level1(),
            };
        static void Main(string[] args)
        {
            using (var t = new StreamWriter(File.Create("./table.csv")))
            {
                using (var csv = new CsvWriter(t))
                {
                    const int c = 2000000000;
                    var stats = new int[Byte.MaxValue + 1];
                    for (int i = 0; i < stats.Length; i++)
                        stats[i] = 0;
                    RNGCryptoServiceProvider p = new RNGCryptoServiceProvider();
                    Parallel.For(0, c, x =>
                    {
                        var buff = new Byte[1];
                        p.GetBytes(buff);
                        stats[buff[0]]++;
                    });

                    var expected = (float)(c / Byte.MaxValue);
                    /*Console.WriteLine("Expected Value " + expected);

                    Console.WriteLine();
                    Console.WriteLine();
                    Console.WriteLine("absolute Value");
                    Console.WriteLine();
                    Console.WriteLine();

                    for (int i = 0; i < stats.Length; i++)
                        Console.WriteLine($"{i.ToString("000")} | {stats[i].ToString("00000000")}");

                    Console.WriteLine();
                    Console.WriteLine();
                    Console.WriteLine("absolute Error");
                    Console.WriteLine();
                    Console.WriteLine();

                    for (int i = 0; i < stats.Length; i++)
                        Console.WriteLine($"{i.ToString("000")} | {(stats[i] - expected).ToString("R")}");

                    Console.WriteLine();
                    Console.WriteLine();
                    Console.WriteLine("% Error");
                    Console.WriteLine();
                    Console.WriteLine();
                    for (int i = 0; i < stats.Length; i++)
                        Console.WriteLine($"{i.ToString("000")} | {((stats[i] - expected) / expected).ToString("P")}");
                        */
                    var table = new List<object>();
                    for (int i = 0; i < stats.Length; i++)
                    {
                        table.Add(new { Value = i,
                            absolute_Value = stats[i],
                            absolute_Error = (stats[i] - expected),
                            percentual_Error = ((stats[i] - expected) / expected)
                        });
                    }
                    csv.WriteRecords(table);
                    csv.Flush();
                    Console.WriteLine("ok.");
                }
            }

            Console.ReadLine();
        }
    }
}

results.csv